diff --git a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/UseCases/ModifyPsychomatrixUseCase.kt b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/UseCases/ModifyPsychomatrixUseCase.kt
index 72f0d08..8092659 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/UseCases/ModifyPsychomatrixUseCase.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/UseCases/ModifyPsychomatrixUseCase.kt
@@ -13,11 +13,11 @@ interface ModifyPsychomatrixUseCase {
 
     fun openPsychomatrixChangedSubscription(): ReceiveChannel<PsychomatrixOperationIsConvert>
 
-    suspend fun makeConvert(psychomatrix: MutablePsychomatrix, operation: Operation): Deferred<Boolean>
-    suspend fun makeInvert(psychomatrix: MutablePsychomatrix, operation: Operation): Deferred<Boolean>
+    fun makeConvert(psychomatrix: MutablePsychomatrix, operation: Operation): Deferred<Boolean>
+    fun makeInvert(psychomatrix: MutablePsychomatrix, operation: Operation): Deferred<Boolean>
 
-    suspend fun getConverts(psychomatrix: Psychomatrix): Deferred<List<Operation>>
-    suspend fun getInverts(psychomatrix: Psychomatrix): Deferred<List<Operation>>
+    fun getConverts(psychomatrix: Psychomatrix): Deferred<List<Operation>>
+    fun getInverts(psychomatrix: Psychomatrix): Deferred<List<Operation>>
 
-    suspend fun getPsychomatrixHistory(psychomatrix: Psychomatrix): Deferred<List<Operation>>
+    fun getPsychomatrixHistory(psychomatrix: Psychomatrix): Deferred<List<Operation>>
 }
\ No newline at end of file
diff --git a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/interactors/ModifyPsychomatrixUseCaseInteractor.kt b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/interactors/ModifyPsychomatrixUseCaseInteractor.kt
index 2432126..eeb04a9 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/interactors/ModifyPsychomatrixUseCaseInteractor.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/domain/interactors/ModifyPsychomatrixUseCaseInteractor.kt
@@ -20,34 +20,34 @@ class ModifyPsychomatrixUseCaseInteractor : ModifyPsychomatrixUseCase {
         return psychomatrixChangedBroadcastChannel.openSubscription()
     }
 
-    override suspend fun makeConvert(psychomatrix: MutablePsychomatrix, operation: Operation): Deferred<Boolean> {
+    override fun makeConvert(psychomatrix: MutablePsychomatrix, operation: Operation): Deferred<Boolean> {
         return async {
             asMutablePsychomatrix(psychomatrix).applyConvert(operation)
         }
     }
 
-    override suspend fun makeInvert(psychomatrix: MutablePsychomatrix, operation: Operation): Deferred<Boolean> {
+    override fun makeInvert(psychomatrix: MutablePsychomatrix, operation: Operation): Deferred<Boolean> {
         return async {
             asMutablePsychomatrix(psychomatrix).applyInvert(operation)
         }
     }
 
-    override suspend fun getConverts(psychomatrix: Psychomatrix): Deferred<List<Operation>> {
+    override fun getConverts(psychomatrix: Psychomatrix): Deferred<List<Operation>> {
         return asMutablePsychomatrix(psychomatrix).availableConverts
     }
 
-    override suspend fun getInverts(psychomatrix: Psychomatrix): Deferred<List<Operation>> {
+    override fun getInverts(psychomatrix: Psychomatrix): Deferred<List<Operation>> {
         return asMutablePsychomatrix(psychomatrix).availableInverts
     }
 
-    override suspend fun getPsychomatrixHistory(psychomatrix: Psychomatrix): Deferred<List<Operation>> {
+    override fun getPsychomatrixHistory(psychomatrix: Psychomatrix): Deferred<List<Operation>> {
         return asMutablePsychomatrix(psychomatrix).operationsHistory
     }
 
     private fun asMutablePsychomatrix(psychomatrix: Psychomatrix): MutablePsychomatrix {
         return currentPsychomatrixes.firstOrNull {
-            it.date == psychomatrix.date
-        } ?: MutablePsychomatrix(psychomatrix).also {
+            it == psychomatrix
+        } ?: (psychomatrix as? MutablePsychomatrix) ?: MutablePsychomatrix(psychomatrix).also {
             currentPsychomatrixes.add(it)
         }
     }
diff --git a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/DefaultRealisations/ModifyPsychomatrixPresenterImpl.kt b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/DefaultRealisations/ModifyPsychomatrixPresenterImpl.kt
index 596445f..45814b7 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/DefaultRealisations/ModifyPsychomatrixPresenterImpl.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/DefaultRealisations/ModifyPsychomatrixPresenterImpl.kt
@@ -17,108 +17,27 @@ class ModifyPsychomatrixPresenterImpl(
     private val modifyPsychomatrixUseCase: ModifyPsychomatrixUseCase
 ) : ModifyPsychomatrixPresenter {
 
-    private val availableConverts = HashMap<Psychomatrix, List<Operation>>()
-    private val availableInverts = HashMap<MutablePsychomatrix, List<Operation>>()
-
-    init {
-        openPsychomatrixChangedSubscription().subscribe {
-            if (it.second.second) {
-                updateConvertsOfPsychomatrix(it.first)
-            } else {
-                updateInvertsOfPsychomatrix(it.first)
-            }
-        }
-    }
-
     override fun openPsychomatrixChangedSubscription(): ReceiveChannel<PsychomatrixOperationIsConvert> {
         return modifyPsychomatrixUseCase.openPsychomatrixChangedSubscription()
     }
 
-    override suspend fun tryToDoOperation(psychomatrix: MutablePsychomatrix, operation: Operation): Deferred<Boolean> {
+    override fun makeConvert(psychomatrix: MutablePsychomatrix, operation: Operation): Deferred<Boolean> {
         return modifyPsychomatrixUseCase.makeConvert(psychomatrix, operation)
     }
 
-    override suspend fun twoGrowFourAvailable(psychomatrix: Psychomatrix): Deferred<Boolean> {
-        return async {
-            (availableConverts[psychomatrix] ?: updateConvertsOfPsychomatrix(psychomatrix)).contains(TwoGrowFour)
-        }
+    override fun makeInvert(psychomatrix: MutablePsychomatrix, operation: Operation): Deferred<Boolean> {
+        return modifyPsychomatrixUseCase.makeInvert(psychomatrix, operation)
     }
 
-    override suspend fun fourGrowTwoAvailable(psychomatrix: Psychomatrix): Deferred<Boolean> {
-        return async {
-            (availableConverts[psychomatrix] ?: updateConvertsOfPsychomatrix(psychomatrix)).contains(FourGrowTwo)
-        }
+    override fun getConverts(psychomatrix: Psychomatrix): Deferred<List<Operation>> {
+        return modifyPsychomatrixUseCase.getConverts(psychomatrix)
     }
 
-    override suspend fun oneGrowEightAvailable(psychomatrix: Psychomatrix): Deferred<Boolean> {
-        return async {
-            (availableConverts[psychomatrix] ?: updateConvertsOfPsychomatrix(psychomatrix)).contains(OneGrowEight)
-        }
+    override fun getInverts(psychomatrix: Psychomatrix): Deferred<List<Operation>> {
+        return modifyPsychomatrixUseCase.getInverts(psychomatrix)
     }
 
-    override suspend fun eightGrowOneAvailable(psychomatrix: Psychomatrix): Deferred<Boolean> {
-        return async {
-            (availableConverts[psychomatrix] ?: updateConvertsOfPsychomatrix(psychomatrix)).contains(EightGrowOne)
-        }
-    }
-
-    override suspend fun sixGrowSevenAvailable(psychomatrix: Psychomatrix): Deferred<Boolean> {
-        return async {
-            (availableConverts[psychomatrix] ?: updateConvertsOfPsychomatrix(psychomatrix)).contains(SixGrowSeven)
-        }
-    }
-
-    override suspend fun sevenGrowSixAvailable(psychomatrix: Psychomatrix): Deferred<Boolean> {
-        return async {
-            (availableConverts[psychomatrix] ?: updateConvertsOfPsychomatrix(psychomatrix)).contains(SevenGrowSix)
-        }
-    }
-
-    override suspend fun fiveGrowNineAvailable(psychomatrix: Psychomatrix): Deferred<Boolean> {
-        return async {
-            (availableConverts[psychomatrix] ?: updateConvertsOfPsychomatrix(psychomatrix)).contains(FiveGrowNine)
-        }
-    }
-
-    override suspend fun nineGrowFiveAvailable(psychomatrix: Psychomatrix): Deferred<Boolean> {
-        return async {
-            (availableConverts[psychomatrix] ?: updateConvertsOfPsychomatrix(psychomatrix)).contains(NineGrowFive)
-        }
-    }
-
-    override suspend fun customGrowAvailable(psychomatrix: Psychomatrix, number: Byte): Deferred<Boolean> {
-        return async {
-            (availableConverts[psychomatrix] ?: updateConvertsOfPsychomatrix(psychomatrix)).firstOrNull {
-                it is GrowCustom && it.number == number
-            } != null
-        }
-    }
-
-    override suspend fun rollback(psychomatrix: MutablePsychomatrix, operations: Int): Job {
-        return launch {
-            history(psychomatrix).await().let {
-                it.subList(it.size - operations, it.size).asReversed()
-            }.forEach {
-                modifyPsychomatrixUseCase.makeInvert(psychomatrix, it)
-            }
-        }
-    }
-
-    override suspend fun history(psychomatrix: MutablePsychomatrix): Deferred<List<Operation>> {
-        return async {
-            availableInverts[psychomatrix] ?: updateInvertsOfPsychomatrix(psychomatrix)
-        }
-    }
-
-    private suspend fun updateConvertsOfPsychomatrix(psychomatrix: Psychomatrix): List<Operation> {
-        return modifyPsychomatrixUseCase.getConverts(psychomatrix).await().also {
-            availableConverts[psychomatrix] = it
-        }
-    }
-
-    private suspend fun updateInvertsOfPsychomatrix(psychomatrix: MutablePsychomatrix): List<Operation> {
-        return modifyPsychomatrixUseCase.getInverts(psychomatrix).await().also {
-            availableInverts[psychomatrix] = it
-        }
+    override fun getPsychomatrixHistory(psychomatrix: Psychomatrix): Deferred<List<Operation>> {
+        return getInverts(psychomatrix)
     }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/ModifyPsychomatrixPresenter.kt b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/ModifyPsychomatrixPresenter.kt
index 658c4bc..f328cb2 100644
--- a/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/ModifyPsychomatrixPresenter.kt
+++ b/src/main/kotlin/com/github/insanusmokrassar/PsychomatrixBase/presentation/presenters/ModifyPsychomatrixPresenter.kt
@@ -12,23 +12,11 @@ interface ModifyPsychomatrixPresenter {
 
     fun openPsychomatrixChangedSubscription(): ReceiveChannel<PsychomatrixOperationIsConvert>
 
-    suspend fun tryToDoOperation(psychomatrix: MutablePsychomatrix, operation: Operation): Deferred<Boolean>
+    fun makeConvert(psychomatrix: MutablePsychomatrix, operation: Operation): Deferred<Boolean>
+    fun makeInvert(psychomatrix: MutablePsychomatrix, operation: Operation): Deferred<Boolean>
 
-    suspend fun twoGrowFourAvailable(psychomatrix: Psychomatrix): Deferred<Boolean>
-    suspend fun fourGrowTwoAvailable(psychomatrix: Psychomatrix): Deferred<Boolean>
+    fun getConverts(psychomatrix: Psychomatrix): Deferred<List<Operation>>
+    fun getInverts(psychomatrix: Psychomatrix): Deferred<List<Operation>>
 
-    suspend fun oneGrowEightAvailable(psychomatrix: Psychomatrix): Deferred<Boolean>
-    suspend fun eightGrowOneAvailable(psychomatrix: Psychomatrix): Deferred<Boolean>
-
-    suspend fun sixGrowSevenAvailable(psychomatrix: Psychomatrix): Deferred<Boolean>
-    suspend fun sevenGrowSixAvailable(psychomatrix: Psychomatrix): Deferred<Boolean>
-
-    suspend fun fiveGrowNineAvailable(psychomatrix: Psychomatrix): Deferred<Boolean>
-    suspend fun nineGrowFiveAvailable(psychomatrix: Psychomatrix): Deferred<Boolean>
-
-    suspend fun customGrowAvailable(psychomatrix: Psychomatrix, number: Byte): Deferred<Boolean>
-
-    suspend fun rollback(psychomatrix: MutablePsychomatrix, operations: Int): Job
-
-    suspend fun history(psychomatrix: MutablePsychomatrix): Deferred<List<Operation>>
+    fun getPsychomatrixHistory(psychomatrix: Psychomatrix): Deferred<List<Operation>>
 }
\ No newline at end of file